Changed 'count' to 'limit' for newer versions of couchdb
Asign instead of compare in uptasks_view_clicked was fixed.
Time debbuging prints added. (tmp)
Even more time debbuging prints added. (tmp)
Hidden columns to tasks view added.
Set task_view_filter after updating model_db
TaskMode.update_db refactored (while waiting for complete rewrite. Some docstrings added.